Unit 6 Practice

The part of the population being studied

• population
• sample
• random

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

What would be the population in this example?
Surveyors in a mall choose shoppers to ask about products they prefer.

• the surveyors
• all shoppers in the mall
• the shoppers who were asked their preferences

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

What would be the sample in this example?
Surveyors in a mall choose shoppers to ask about products they prefer.

• the surveyors
• all shoppers in the mall
• the shoppers who were asked their preferences

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

The average annual salary for 35 of a company's 1200 accountants is $68,000.

• parameter
• statistic

As of January 2007, 44% of the governors of the 50 states in the US are Republicans.

• parameter
• statistic

Tags

CCSS.HSS.IC.B.3

In  a recent year, the average math scores for all graduates on the ACT was 21.1.

• parameter
• statistic

In a survey of a sample of computer users, 8% said their computer had a malfunction that needed to be repaired by a service technician.

• parameter
• statistic

Tags

CCSS.HSS.IC.B.3

Why do we want our samples to be random?

• To decrease the margin of error

• To increase our confidence

• To decrease variability

• To decrease bias

Tags

CCSS.HSS.IC.B.3

How do we reduce bias?

• Increase variability

• Increase randomness

• Decrease randomness

• Decrease variability

Tags

CCSS.HSS.IC.B.3

How do we reduce variability?

• Increase randomness.

• Increase sample size.

• Decrease randomness.

• Decrease sample size.